Studebaker and AMC used there own variation of other company's stuff, and IH did it with trucks also except theres was more body panal borrowing. The Stude and AMC engines are there own with only designes used from the Chevy or Ford or Mopar engine it is designed from. some parts are interchangable but what, I don't know. It will be hard finding hi po parts for that engine. your best bet is to get a 350 and bolt it in, the mounts may be the same, probably not, then that means your trans will not bolt to the engine, so you are going to have to get a TH350 for it or TH400 if you need the strength. Because Studebaker was closely related to mopar rather than chevy ( look at an early 60's Valiant, up to '64 or '65 and compare the front end to your car ) so put in a 360 crate engine from Mopar and get a 727 torq flight. nice car, has it been restored?